The wrench is primarily formed of stampings assembled with rivets. Two rivets hold all the movable jaw parts together including the adjusting worm and the pin it turns on. The stamped "yoke" which wraps around the main shank includes "ears" which form guards to prevent accidental alteration of the the adjustment. The patent was used for a series of adjustable wrenches produced by the Wakefield Wrench Company of Worcester, Mass. Some examples of the 7 inch size are also marked INDIAN MOTOCYCLES HENDEE MFG. CO. SPRINGFIELD MASS. in addition to the WAKEFIELD WRENCH markings. Some are also marked with Wakefield's WIZARD trade mark.